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1200kg car speeds up from 2 m/s to 6 m/s. How many times greater is the car's kinetic energy at the higher speed compared to the kinetic energy at the slower speed?

1200kg car speeds up from 2 m/s to 6 m/s. How many times greater is the car's kinetic energy at the higher speed compared to the kinetic energy at the slower speed?
asked 108k views
14 votes
1200kg car speeds up from 2 m/s to 6 m/s. How many times greater is the car's kinetic

energy at the higher speed compared to the kinetic energy at the slower speed?

asked
User Tushar Korde
by
8.6k points

1 Answer

10 votes

Answer:

9 times as great

Step-by-step explanation:

KE = 1/2mv²

  1. 1/2(1200)(2)² = 2,400 J
  2. 1/2(1200)(6)² = 21,600 J

21,600 / 2,400 = 9

answered
User Vallo
by
9.0k points
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